What? This makes no sense at all.
Answer:
click their picture and follow
If we will base our answer on Hertzsprung diagram, we
will see that mass and luminosity are directly related, which means, long lived
stars begin their lives with more mass and a larger amount of hydrogen fuel,
hence hydrogen is abundant before than now. They are more luminous during their
main sequence lives. Giant stars and supergiant
stars have great masses, so, they have greater luminosities.
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The United States is a More Developed Country (MDC)
